The start script also includes options for creating a shortcut, configuring the wrapper etc.
From there simply run the start script to play. The output will be a directory containing the game set up within a preconfigured Wine prefix, along with its own copy of Wine, extracted game icons, documentation, and start script(s). The build path can also be set with the WINEWRAP_BUILDPATH environment variable. You can change the path to build the wrapper in and the name of the wrapper directory with the -buildpath= and -dirname= arguments. If the installer files are not alongside the wrapper build files then the path to them will need to be specified either by passing it as an argument to the build script with -respath='' or by setting an environment variable named WINEWRAP_RESPATH containing it. Simply run the build script to create the wrapper.
I've put together a Wine wrapper for Saints Row 2, allowing it to be played on Linux almost like a native game & with no Wine knowledge required.